The DPAPI is a Win­dows sys­tem which stored pass­words bound to the local system. In the user direc­to­ry there are the keys stored in the AppData\Roaming\Microsoft\Protect\<SID> directory. From the user’s pass­word, a mas­ter key is derived. When the user changes his pass­word, a new mas­ter key is gen­er­at­ed as well — and all old mas­ter…